Ownership concentration was encouraged by the Corporate Law, which until recently allowed companies to issue non-voting shares, referred to as “preferred shares,” of up to two thirds of a company's capital.
La concentración estuvo alentada por la Ley de empresas mercantiles, que hasta recientemente permitía a las empresas emitir acciones sin derecho de voto, denominadas "acciones preferentes", por un valor de hasta dos tercios del capital de la empresa.